Quote Originally Posted by Avilan the Grey View Post
Again, in my experience only products that have a free option do that.
Avira, Avast and AVG among others.
This.

Personally, I found Avira and AVG to be a lot more persistent and annoying than Avast, but that is of course up to personal preference in the end. I am currently happy with my free version of BitDefender, and have yet to see a single nagging ad.